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8.4.2 Ladder stiles
a) Ensure that no dents, holes, or cracks have any influence on the stiles´
stability.
b) The dents shall not exceed 20mm in diameter or be more than 1 mm
deep.
c) If dents are found on the stile edges or corners, the stile stability can no
longer be guaranteed. In such case, replace the ladder section.
8.4.3 Flange connection kits
a) The distance between the rungs at tower flange connection shall be
minimum 255 mm and maximum 300 mm.
8.4.4 Ladder ends
a) On the top and bottom ends of the complete ladder system, a
protection guard (such as the AVANTI rubber feet or end cap) shall be put
in place on the stiles.
8.4.5 Safety rail
a) Ensure that the safety rail sections are mounted according to the
installation instructions of this manual.
b) Ensure that no sharp rail ends are present.
c) Check the legibility of the product marking. If marking is not present, a
certified technician shall replace them.
d) During the erection of the wind turbine towers, top and bottom rail-
stops shall be mounted on each individual tower section.
e) Ensure that top and bottom rail-stops are mounted.
8.4.6 Fish-joints
a) Ensure that the fish-joints are mounted with 4 hammerhead screws.
b) Ensure that the gap between consecutive safety rails is minimum 1mm
and maximum 4 mm.
c) Ensure that the indicator mark of each hammerhead screw and the
self-locking nuts are at an angle of 70º.
d) Make sure that all hammerhead screws and self-locking nuts of the rail
system are present and torqued to 8 Nm.
8.4.7 Circular inspection sticker
a) Ensure that the sticker is present and that the due date has not
expired.
8.5 Ordering spare parts
a) If any part of the FPS is found to be broken, unsafe or missing,
put the FPS out of service immediately.
b) Subsequently, contact an AVANTI representative to replace/
repair the missing parts.
c) Finally, a certified technician shall carry out an inspection
following the inspection procedure.
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APPROVED
MASTER 47840008 EN_CORREGIDO.indd 16
25/10/17 12:01
